%A LUO Bing,LIU Feng-Zhen,WAN Yong-Shan,ZHANG Kun,ZHAO Wen-Xiang %T Dynamic Changes of Endogenous Hormones Content and Dry Matter Accumulation of Pods and Kernels in Different Varieties (Lines) of Peanut (Arachis hypogaea L.) %0 Journal Article %D 2013 %J Acta Agronomica Sinica %R 10.3724/SP.J.1006.2013.02083 %P 2083-2093 %V 39 %N 11 %U {https://zwxb.chinacrops.org/CN/abstract/article_5520.shtml} %8 2013-11-12 %X

Endogenous hormones play important roles in plant growth and development , and yield formation. To reveal the relationship between dry matter accumulation and hormones content in developing pods and kernels,  we conducted an experiment using three peanut varieties (lines) with normal seeds and one wrinkled mutant line 05D677. The main results were as follows: (1) The period of 24–60 days after peg penetration was a rapid dry weight accumulation phase, during which the average of both pod dry matter accumulation rate (PKW) and the corresponding kernel dry matter accumulation rate (KKW) of Shanhua 15, 05D610 and Baisha 1016 was significantly higher than that of 05D677; the PKW and KKW of the three normal varieties peaked at 30 days, different from those of 05D677 at 36 days. (2) The four varieties shared much the same dynamic changes trends of cytokinin (Z+ZR), gibberellin (GA), auxin (IAA) and abscisic acid (ABA) in the young pods or kernels. However, GA content of 05D677 peaked six days later than that of other three normal varieties; the peak values of Z+ZR, GA and ABA contents of 05D677 were all very significantly lower than those of other three, while the opposite result was discovered as to IAA content. (3) In the middle and late periods of pod expansion, Z+ZR, GA and ABA contents were in very significantly positive correlation with PKW and KKW, while the opposite for IAA content. Z+ZR content had very significantly positive correlation with PKW and KKW in the early pod filling period, and the same result was found between GA content and PKW in the late filling and mature period. ABA content had very significantly negative correlation with PKW and KKW in the late pod filling, while had a very significantly positive correlation with PKW in the mature period. (4) Compared with other three normal cultivars, IAA content of 05D677 was significantly increased in the early pod and kernel expansion period accompanied by insufficient Z+ZR, GA and ABA contents, and the proportion imbalances of endogenous hormones possibly led to development process delay and significantly reduced dry matter accumulation rate of pods and kernels, which may be the reason for plumpness shortage and shrink seeds of 05D677.